Join M4A recordings into one file

Keep M4A as the output

1. Choose Join MP3. This workflow also accepts supported M4A audio files.
2. Add the recordings and arrange them into the listening order.
3. In Export, change Output format from the default MP3 to M4A (AAC).
4. Trim any unwanted edges, choose the transition, and click Join & Export.

Let the audio settings guide you

Two files ending in .m4a can contain different audio streams or recording settings. Smart mode copies only when the audio and selected settings are compatible; otherwise the program encodes the result.

If the recordings have different sample rates or channels, select the output settings you need and allow them to be processed together. Renaming the file extension does not convert its audio.

Check a voice-note sequence

Play the transition between recordings, especially where a speaker resumes after a pause. Confirm that the saved file is M4A and that its order matches the queue.